Tl* the consumer owned a 2018 Mercedes-benz s560. After driving the vehicle for approximately three minutes, the contact parked the vehicle. The consumer was alerted by someone that there was smoke under the hood of the vehicle. Within thirty seconds to a minute, the vehicle became engulfed in flames. The fire department was notified and extinguished the fire. The engine compartment and vehicle…
2018 Mercedes-Benz S-Class engine problems
severe 6 complaints filed with NHTSA · avg repair $3,100 · see engine across all vehicles →
Complaints
6
Recalls
0
Avg fix
$3,100
1fire
When does it fail?
Of the 6 engine complaints filed for the 2018 Mercedes-Benz S-Class, here's the actual mileage breakdown — failures cluster heaviest at 25,000-50,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Among the 5 model years of Mercedes-Benz S-Class in our records for engine problems, this one ranks #3 by owner-complaint volume.
Engine accounts for 21% of all owner complaints filed against this vehicle, across 3 categories tracked.
What owners are reporting 5 most recent
Ignition coil failed and cylinder 5 misfired. Car has less than 30K miles.
Walk Home Condition -I purchased a 2018 CPO Mercedes-Benz S560 on 8/20/21 from Knauz Continental Autos in Lake Bluff, IL. On 9/25/2, at approx noon, I was driving the vehicle and the engine light came on, the throttle/engine felt sluggish and not responsive. The engine felt very out of balance shaking the entire care when the gas pedal was pressed. 5 mins later in heavy traffic, I stopped at a…
2018 Mercedes benz s class. Consumer writes in regards to rework engine oil plugs safety recall. *ld the consumer stated the manufacturer exceeded a reasonable amount of time completing the recall repair. *js the consumer stated the vehicle was repaired. *js
My 2018 S560 Mercedes occasionally misfires upon acceleration. This has happened at six times over the past three years. When this happens, the engine loses power, starts to shake, and the check engine light comes on. This happened when I was trying to pass a car on US 301 a week ago nearly causing a head on collision as I tried to get back into the right lane. The problem occurs without…
Had engine trouble with your 2018 Mercedes-Benz S-Class?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the engine problem on the 2018 Mercedes-Benz S-Class?
It's a meaningful issue. 6 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $3,100.
At what mileage does the engine typically fail?
Based on the 6 complaints filed, engine issues most often appear around 39,000 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $3,100 for engine repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to engine?
No active recalls currently cover engine issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2018/Mercedes-Benz/S-Class.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.